www.zahidenotes.com
a) Water
c) Ammonia
64.
Which one has high m.p?
a) NaCl
c) Nal
65.
b) Au
d) Os
Which impurities are present in common salt?
a) Na2SO4
c) CaCl2
72.
b) Sr
d) All of these
Which metal is an important component of transistors?
a) Ag
c) Ra
71.
b) Mg
d) Ba
Which one of the following elements has its compounds which are diamagnetic and colourless?
a) Be
c) Na
70.
b) NaCl
d) NaOH
The radioactive alkaline earth metal is
a) Be
c) Ra
69.
b) CaSO4.H2O
d) MgSO4
Which one is commonly used as a
laboratory desicator?
a) Na2CO3
c) CaCl3
68.
b) SiO2
d) MgO
Gypsum is
a) CaSO4.2H2O
c) CaSO4
67.
b) NaBr
d) NaF
Which one of the following is most basic?
a) Al2O3
c) P2O5
66.
b) Alcohol
d) Kerosene oil
b) CaSO4
d) All of these
K can displace Na from NaCl due to
a)
b)
c)
d)
Greater I.P of K
Greater I.P of Na
More electropositivity of K
More electropositivity of Na
www.zahidenotes.com
73.
The alkali metal, which is artificially prepared
a) Na
c) Fr
74.
The chemical use for the production of CO2 in the fire extinguishers is
a)
b)
c)
d)
75.
NaOH
NaCl
NaHCO3 and dilute acid
NaHCO3 and NaOH
LiCl is more soluble in organic solvents than NaCl because
a)
b)
c)
d)
76.
Li+1 has higher heat of hydration than Na+
Li+1 has lower heat of hydration than Na+
LiCl is more covalent than NaCl
Lattice energy of NaCl is less than that of LiCl
Which compound is used for uric acid treatment in human beings?
a) Na2CO3
c) Li2CO3
77.
Oxygen and giving out CO2 at the same time
N2 and giving out CO2 at the same time
CO2 and giving out O2 at the same time
Pollutants and giving out O2 at the same time
The hydroxide, which is called milk of magnesium and is used for treatment of acidity in stomach,
is
a) Ca(OH)2
c) Sr(OH)2
82.
b) Monoclinic
d) Orthorhombic
Potassium super oxide (KO2) is used in breathing equipments for mountaineers and space craft
because it absorb
a)
b)
c)
d)
81.
b) Gypsum
d) Baking soda
Plaster of Paris has a structure
a) Cubic
c) Hexagonal
80.
b) K
d) Cs
Which one is used in the manufacture of chalk pencils?
a) Marble
c) Epsom salt
79.
b) NaHCO3
d) NaNO3
Which element is used in T.V picture tube?
a) Na
c) Ca
78.
b) Rb
d) Cs
b) Mg(OH)2
d) Ba(OH)2
Mg+2 is smaller the Na+1 because
0
